As with my other book notes, some passages are direct quotes and others are my own paraphrasing/summaries. Any footnotes or [brackets] are my personal comments.
The Intelligent Investor (1973) + Security Analysis (1934), by Benjamin Graham
To invest intelligently in securities one should be forearmed with an adequate knowledge of how the various types of bonds and stocks have actually behaved under varying conditions—some of which, at least, one is likely to meet again in one’s own experience.
An investment operation is one which, upon thorough analysis promises safety of principle and an adequate return. Operations not meeting these requirements are speculative. An investment operation is one that can be justified on both qualitative and quantitative grounds.
We speak of an investment operation rather than an issue or a purchase, for several reasons. An investment might be justified in a group of issues, which would not be sufficiently safe if made in any one of them singly. In our view it is also proper to consider as investment operations certain types of arbitrage and hedging commitments which involve the sale of one security against the purchase of another. The safety sought in investment is not absolute or complete; the word means, rather, protection against loss under all normal or reasonably likely conditions or variations. A safe stock is one which holds every prospect of being worth the price paid except under quite unlikely contingencies.
Outright speculation is neither illegal, immoral, nor (for most people) fattening to the pocketbook. There is intelligent speculation as there is intelligent investing. But there are many ways in which speculation may be unintelligent. Of these the foremost are: (1) speculating when you think you are investing; (2) speculating seriously instead of as a pastime, when you lack proper knowledge and skill for it; and (3) risking more money in speculation than you can afford to lose.
The defensive (or passive) investor will place his chief emphasis on the avoidance of serious mistakes or losses. His second aim will be freedom from effort, annoyance, and the need for making frequent decisions. The determining trait of the enterprising (or active, aggressive) investor is his willingness to devote time and care to the selection of securities that are both sound and more attractive than average.
Obvious prospects for physical growth in a business do not translate into obvious profits for investors. The future of security prices is never predictable.
In his endeavor to select the most promising stocks wither for the near term or the longer future, the investor faces obstacles of two kinds—the first stemming from human fallibility and the second from the nature of his competition. He may be wrong in his estimate of the future; or even if he is right, the current market price may already fully reflect what he is anticipating. In the area of near-term selectivity, the current year’s results of the company are generally common property on Wall Street; the next year’s results, to the extent they are predictable, are already being carefully considered. Hence the investor who selects issues chiefly on the basis of this year’s superior results, or on what he is told he may expect for next year, is likely to find that others have done the same thing for the same reason. To enjoy a reasonable chance for continued better than average results, the investor must follow policies which are (1) inherently sound and promising, and (2) not popular on Wall Street.